CN108548480A - Three layers of selfreparing flexibility strain transducer of one kind and preparation method thereof - Google Patents
Three layers of selfreparing flexibility strain transducer of one kind and preparation method thereof Download PDFInfo
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- CN108548480A CN108548480A CN201810440415.9A CN201810440415A CN108548480A CN 108548480 A CN108548480 A CN 108548480A CN 201810440415 A CN201810440415 A CN 201810440415A CN 108548480 A CN108548480 A CN 108548480A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/28—Multiple coating on one surface
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2479/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2461/00 - C08J2477/00
- C08J2479/02—Polyamines
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
Abstract
The invention discloses a kind of three layers of selfreparing flexibility strain transducers and preparation method thereof, and wherein sensor includes selfreparing sensitive layer, and the selfreparing sensitive layer upper and lower surface is each provided with selfreparing encapsulated layer；The selfreparing sensitive layer includes the one kind adulterated in carbon-based material or conducing composite material；Inside and outside damage caused by three layers of reconditioning layer of selfreparing strain transducer can quickly repair layered structure in the short time under room temperature after external world, does not need dynamic excitation；The structure is prepared simply, is not necessarily to renovation agent, reparation can be repeated several times；On the one hand the structure increases intensity and modulus of the strain transducer on thickness, on the other hand increase the ability of the anti-environmental damage of strain transducer.
Description
Technical field
The present invention relates to functional film technical fields, and in particular to a kind of three layers of selfreparing flexibility strain transducer and its
Preparation method.
Background technology
In recent years, with the fast development of material science, flexible strain transducer not only overcomes traditional strain transducer rigid
Property and the shortcomings of brittleness, flexibility also greatly expanded strain transducer biologic medical field, field of electronic devices and
The utilization in the fields such as wearable device.During use, due to being acted on by the external world, it can make inside or the table of material
Face generates inevitable defect or damage, normally behaves as crackle or micro-crack.The crackle of these delamination damages will not be immediately
Lead to structural damage, but it is difficult to be found or detect.If the performance that can cause material, device cannot be repaired in time
It reduces, or even generates the fracture of macroscopic view.Therefore, it is very for resulting from the crackle of delamination damage and effectively repair in time
It is necessary to.The function that the layering of pair of strain sensors each group assigns selfreparing can efficiently solve these problems.
Patent CN206724883U discloses a kind of selfreparing flexible electronic strain transducer, which includes that two panels is flat
The self-repair material plate of row setting, is fixedly connected by coated nanoparticles conductive layer between self-repair material plate medial surface；It should
Sensor has the characteristics that self diagnosis, self-regeneration and light weight, flexible, good toughness.But such sensor is only certainly
When repair layer meets with minor harm and do not destroy conductive layer, it can ensure the superperformance of sensor；When sensor is by complete
When full rupture failure, since nano-particle conductive layer does not have a self-healing properties, the performance of sensor will deep fades even
It loses, it is difficult to repair.
Invention content
It is an object of the invention to：Three layers of selfreparing flexibility strain transducer of one kind and preparation method thereof is provided, is solved
When selfreparing flexibility strain transducer is by complete rupture failure at present, repairing performance is poor, repairs to be not thorough etc. and leads to sensor
The technical issues of performance deep fades or forfeiture.
The technical solution adopted by the present invention is as follows：
A kind of three layers of selfreparing flexibility strain transducer, including selfreparing sensitive layer, following table on the selfreparing sensitive layer
Face is each provided with selfreparing encapsulated layer.
Further, the selfreparing encapsulated layer includes following components：Hydroxy-end capped poly- two of 0.2-0.33 parts by weight
The N of methylsiloxane (PDMS), the polyacrylic acid (PAA) of 0.8-1 parts by weight, 0.070-0.086 parts by weight, N '-dicyclohexyls
4- (dimethyl) pyridine (DMAP) of carbodiimide (DCC) and 0.050-0.056 parts by weight；
Further, the selfreparing sensitive layer includes the one kind adulterated in carbon-based material or conducing composite material.
Further, the doping carbon-based material includes the polyacrylic acid (PAA) of 0.8-1 parts by weight, 0.1-0.2 parts by weight
Poly-dopamine (PDA) and 0.02-0.05 parts by weight carbon-based materials；
Or the hydroxy-end capped dimethyl silicone polymer of 1 polyacrylic acid (PAA) of parts by weight, 0.2-0.33 parts by weight
(PDMS), the carbon-based material of poly-dopamine (PDA) and 0.02-0.05 parts by weight of 0.1-0.2 parts by weight.
Further, the carbon-based material includes that graphene, redox graphene, graphene quantum dot, graphene are received
One or more of rice piece, carbon nanotube, carbon nano-fiber.
Further, described to lead the polyacrylic acid (PAA) that composite material includes 0.8-1 parts by weight, 0.1-0.2 parts by weight
Iron chloride (the FeCl of poly-dopamine (PDA) and 0.05-0.1 parts by weight3)；
Or 1 polyacrylic acid (PAA) of parts by weight, 0.2-0.33 parts by weight hydroxy-end capped dimethyl silicone polymer,
The poly-dopamine (PDA) of 0.1-0.2 parts by weight and the iron chloride (FeCl of 0.05-0.1 parts by weight3)。
A kind of preparation method of three layers of selfreparing flexibility strain transducer, includes the following steps：
Step 1：Selfreparing encapsulated layer composite material is prepared, concentrated solution is obtained；
Step 2：Selfreparing sensitive layer composite material is prepared, thick liquid is obtained；
Step 3：By the thick liquid drop coating in substrate of glass, solidification is stood at room temperature；
Step 4：Concentrated solution described in drop coating, stands solidification at room temperature in film layer after step 3 solidification；
Step 5：Film layer after the step 4 is cured is removed from substrate of glass, draws two conducting wires as electrode；
Step 6：The concentrated solution of the another side equivalent of film layer after step 3 solidification obtains three layers certainly being stored at room temperature solidification
The strain transducer of reparation.
Further, the step 1 is specially：
S101：In reaction bulb be added 40-50ml tetrahydrofuran, sequentially add 0.8-1g polyacrylic acid (PAA),
70-86mg N, N '-dicyclohexylcarbodiimides (DCC) and 50-56mg 4- (dimethyl) pyridine (DMAP), are put into magnetic agitation
Son is placed on magnetic stirring apparatus the stirring of the rotating speed with 400-500r/min 1-2h；
S102：The hydroxy-end capped dimethyl silicone polymers (PDMS) of 0.2-0.33g are added in above-mentioned reaction bulb, after sealing
Magnetic agitation 8-12h at ambient temperature；
S103：Above-mentioned solution is heated 60-90 DEG C of stirring evaporation solvent 20-30min to obtain until solution is in thick
Concentrated solution.
Further, the step 2 is specially：
S201：Prepare conducing composite material solution：The tetrahydrofuran of 40-50ml is added in reaction bulb, sequentially adds
0.8-1g polyacrylic acid (PAA), 0.1-0.2g poly-dopamines (PDA) and 0.05-0.1g iron chloride (FeCl3)；Or 1g polypropylene
Sour (PAA), 0.2-0.33g hydroxy-end capped dimethyl silicone polymer, 0.1-0.2g poly-dopamines (PDA) and 0.05-0.1g chlorine
Change iron (FeCl3), it is put into the rotating speed that magnetic stir bar is placed on magnetic stirring apparatus with 400-500r/min and stirs 8-12h；
Or prepare doping carbon-based material solution：The tetrahydrofuran of 40-50ml is added in reaction bulb, sequentially adds
0.8g-1g polyacrylic acid (PAA), 0.1-0.2g poly-dopamines (PDA) and 0.02-0.05g carbon-based materials or 1g polyacrylic acid
(PAA), dimethyl silicone polymer hydroxy-end capped 0.2-0.33g (PDMS), 0.1-0.2g poly-dopamines (PDA) and 0.02-
0.05g carbon-based materials；
S202：Above-mentioned solution is heated 60-90 DEG C of stirring evaporation solvent 20-30min to obtain until solution is in thick
Thick liquid.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1. in the present invention, selfreparing flexibility strain transducer is divided into three-decker, wherein encapsulated layer and sensitive layer has respectively
There is the function of selfreparing.
2. in the present invention, the repair mechanisms of the encapsulated layer of selfreparing flexibility strain transducer are based on different polyacrylic acid
The hydrogen bond formed between carboxyl can be not necessarily to external condition at ambient temperature and realize reparation.
3. in the present invention, the repair mechanisms of the sensitive layer of selfreparing flexibility strain transducer are based on different polyacrylic acid
One or both of the hydrogen bond formed between carboxyl and metal coordinate bond.It is this it is double repair network can guarantee be more easy to realize repair and
Repairing effect is more preferable.
4. in the present invention, three layers of reconditioning layer of selfreparing strain transducer can be short under room temperature after external world
Inside and outside damage caused by quickly repairing layered structure in time, does not need dynamic excitation.
5. in the present invention, three layers of strain transducer for reviewing one's lessons by oneself complex structure are prepared simply, and renovation agent is not necessarily to, at room temperature can be real
Now quick selfreparing, the features such as reparation can be repeated several times.
6. three layers in the present invention are reviewed one's lessons by oneself complex structure and on the one hand increase intensity and modulus of the strain transducer on thickness,
On the other hand the ability of the anti-environmental damage of strain transducer is increased.
7. present invention can apply to wearable devices to monitor human motion state；Since selfreparing encapsulated layer material surface contains
There is abundant carboxyl, there is good tack and non-stimulated to skin.On the one hand it will be set without using additional adhesive tape
On the skin, the mechanics sensitivity characteristic of flexible strain transducer can be increased by the other hand fitting closely skin for standby adherency.
Description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is the cross-sectional view of three layers of strain transducer for reviewing one's lessons by oneself complex structure in the present invention；
Fig. 2 is that selfreparing strain transducer is applied to the test pictorial diagram under wrist relaxation state in embodiment 3 in the present invention；
Fig. 3 is that selfreparing strain transducer is applied to the test pictorial diagram under wrist flexuosity in embodiment 3 in the present invention；
Fig. 4 is 3 selfreparing strain transducer of embodiment recovery test curve graph three times in the present invention；
Reference numeral：1- selfreparing encapsulated layers, 2- selfreparing sensitive layers.
Specific implementation mode
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
It elaborates with reference to Fig. 1-4 couples of present invention.
A kind of three layers of selfreparing flexibility strain transducer, including selfreparing sensitive layer 2, about the 2 selfreparing sensitive layer
Surface is each provided with selfreparing encapsulated layer 1；The selfreparing encapsulated layer 1 includes following components：The hydroxyl of 0.2-0.33 parts by weight
The N of the dimethyl silicone polymer (PDMS) of sealing end, the polyacrylic acid (PAA) of 0.8-1 parts by weight, 0.070-0.086 parts by weight,
4- (dimethyl) pyridine (DMAP) of N '-dicyclohexylcarbodiimides (DCC) and 0.050-0.056 parts by weight；
The selfreparing sensitive layer 2 includes one kind in doping carbon-based material or conducing composite material.
It is described doping carbon-based material include the polyacrylic acid (PAA) of 0.8-1 parts by weight, 0.1-0.2 parts by weight poly- DOPA
Amine (PDA) and 0.02-0.05 parts by weight carbon-based materials；Or the hydroxyl of 1 polyacrylic acid (PAA) of parts by weight, 0.2-0.33 parts by weight
The dimethyl silicone polymer (PDMS) of base sealing end, the poly-dopamine (PDA) and 0.02-0.05 parts by weight of 0.1-0.2 parts by weight
Carbon-based material.The carbon-based material includes that graphene, redox graphene, graphene quantum dot, graphene nanometer sheet, carbon are received
One or more of mitron, carbon nano-fiber.
It is described to lead the polyacrylic acid (PAA) that composite material includes 0.8-1 parts by weight, the poly-dopamine of 0.1-0.2 parts by weight
(PDA) and the iron chloride (FeCl of 0.05-0.1 parts by weight3)；Or 1 polyacrylic acid (PAA) of parts by weight, 0.2-0.33 parts by weight
Hydroxy-end capped dimethyl silicone polymer, 0.1-0.2 parts by weight poly-dopamine (PDA) and 0.05-0.1 parts by weight chlorination
Iron (FeCl3)。
A kind of preparation method of three layers of selfreparing flexibility strain transducer, includes the following steps：
Step 1：Selfreparing encapsulated layer composite material is prepared, concentrated solution is obtained；
S101：In reaction bulb be added 40-50m1 tetrahydrofuran, sequentially add 0.8-1g polyacrylic acid (PAA),
70-86mg N, N '-dicyclohexylcarbodiimides (DCC) and 50-56mg 4- (dimethyl) pyridine (DMAP), are put into magnetic agitation
Son is placed on magnetic stirring apparatus the stirring of the rotating speed with 400-500r/min 1-2h；
S102：The hydroxy-end capped dimethyl silicone polymers (PDMS) of 0.2-0.33g are added in above-mentioned reaction bulb, after sealing
Magnetic agitation 8-12h at ambient temperature；
S103：Above-mentioned solution is heated 60-90 DEG C of stirring evaporation solvent 20-30min to obtain until solution is in thick
Concentrated solution.
Step 2：Selfreparing sensitive layer composite material is prepared, thick liquid is obtained；
S201：Prepare conducing composite material solution：The tetrahydrofuran of 40-50ml is added in reaction bulb, sequentially adds
0.8-1g polyacrylic acid (PAA), 0.1-0.2g poly-dopamines (PDA) and 0.05-0.1g iron chloride (FeCl3) or 1g polyacrylic acid
(PAA), dimethyl silicone polymer hydroxy-end capped 0.2-0.33g, 0.1-0.2g poly-dopamines (PDA) and 0.05-0.1g chlorinations
Iron (FeCl3), it is put into the rotating speed that magnetic stir bar is placed on magnetic stirring apparatus with 400-500r/min and stirs 8-12h；
Or prepare doping carbon-based material solution：The tetrahydrofuran of 40-50ml is added in reaction bulb, sequentially adds
0.8g-1g polyacrylic acid (PAA), 0.1-0.2g poly-dopamines (PDA) and 0.02-0.05g carbon-based materials or 1g polyacrylic acid
(PAA), dimethyl silicone polymer hydroxy-end capped 0.2-0.33g (PDMS), 0.1-0.2g poly-dopamines (PDA) and 0.02-
0.05g carbon-based materials；
S202：Above-mentioned solution is heated 60-90 DEG C of stirring evaporation solvent 20-30min to obtain until solution is in thick
Thick liquid.
Step 3：By the thick liquid drop coating in substrate of glass, solidification is stood at room temperature；
Step 4：Concentrated solution described in drop coating, stands solidification at room temperature in film layer after step 3 solidification；
Step 5：Film layer after the step 4 is cured is removed from substrate of glass, draws two conducting wires as electrode；
Step 6：The concentrated solution of the another side equivalent of film layer after step 3 solidification obtains three layers certainly being stored at room temperature solidification
The strain transducer of reparation.
Specific embodiment 1
The present embodiment will adulterate carbon-based material as the material of selfreparing sensitive layer, review one's lessons by oneself the flexible of complex structure for three layers and strain
Sensor, specific processing technology are：
Step 1：In reaction bulb 1 be added 40ml tetrahydrofuran, sequentially add 0.8g polyacrylic acid (PAA),
70mgN, N '-dicyclohexylcarbodiimide (DCC), 55mg 4- (dimethyl) pyridine (DMAP), are put into magnetic stir bar and are placed in
2h is stirred with the rotating speed of 400-500r/min on magnetic stirring apparatus；The hydroxy-end capped poly- diformazans of 0.2g are added in above-mentioned reaction bulb
Radical siloxane (PDMS), magnetic agitation 12h at ambient temperature after sealing；Above-mentioned solution is heated into 90 DEG C of stirring evaporation solvents
20min obtains concentrated solution until solution is in thick.
Step 2：The tetrahydrofuran of 40ml is added in reaction bulb 2, sequentially adds 0.8g polyacrylic acid (PAA), 0.25g
Poly-dopamine (PDA) and 0.1g carbon nanotubes (CNTs), are put into magnetic stir bar and are placed on magnetic stirring apparatus with 400-500r/
The rotating speed of min stirs 12h；Above-mentioned solution is heated 90 DEG C of stirring evaporation solvent 20min to obtain dense until solution is in thick
Thick liquid.
Step 3：By the thick liquid drop coating in clean substrate of glass, cure after standing 1h in room temperature.
Step 4：Concentrated solution described in drop coating, continues to cure after standing 1h at room temperature in the film layer that step 3 solidification obtains.
Step 5：Film layer after the step 4 is cured is removed from substrate of glass, draws two conducting wires as electrode；
Step 6：The concentrated solution of the another side equivalent of film layer after step 3 solidification obtains three layers certainly being stored at room temperature solidification
The strain transducer of reparation.
The flexible strain transducer that three layers prepared in the present embodiment review one's lessons by oneself complex structure has good tensile property, conduction
Performance can be repaired quickly at ambient temperature after destruction, and keep the good performance of original sensor.
Specific embodiment 2
The present embodiment prepares the flexible strain that three layers are reviewed one's lessons by oneself complex structure and passes using conducing composite material as selfreparing sensitive layer
Sensor, specific process step are：
Step 1：The tetrahydrofuran of 40ml is added in reaction bulb 1, sequentially adds 1g polyacrylic acid (PAA), 86mgN,
N '-dicyclohexylcarbodiimides (DCC), 60mg 4- (dimethyl) pyridine (DMAP) are put into magnetic stir bar and are placed in magnetic force and stir
Mix the rotating speed stirring 2h with 400-500r/min on device；The hydroxy-end capped polydimethylsiloxanes of 0.2g are added in above-mentioned reaction bulb
Alkane (PDMS), magnetic agitation 12h at ambient temperature after sealing；Above-mentioned solution is heated into 90 DEG C of stirring evaporation solvent 20min, directly
It is in thick to solution, obtains concentrated solution.
Step 2：The tetrahydrofuran of 40ml is added in reaction bulb 2, sequentially adds 0.8g polyacrylic acid (PAA), 0.2g
Poly-dopamine (PDA) and 0.1g iron chloride (FeCl3), it is put into magnetic stir bar and is placed on magnetic stirring apparatus with 400-500r/
The rotating speed of min stirs 12h；Above-mentioned solution is heated 90 DEG C of stirring evaporation solvent 20min to obtain dense until solution is in thick
Thick liquid.
Step 3：By the thick liquid drop coating in clean substrate of glass, cure after standing 1h in room temperature.
Step 4：Concentrated solution described in drop coating, continues to cure after standing 1h at room temperature in the film layer that step 3 solidification obtains.
Step 5：Film layer after the step 4 is cured is removed from substrate of glass, draws two conducting wires as electrode；
Step 6：The concentrated solution of the another side equivalent of film layer after step 3 solidification obtains three layers certainly being stored at room temperature solidification
The strain transducer of reparation.
The flexible strain transducer that three layers prepared in the present embodiment review one's lessons by oneself complex structure has good tensile property, conduction
Performance can be repaired quickly at ambient temperature after destruction, and keep the good performance of original sensor.
Specific embodiment 3
The present embodiment prepares the flexible strain that three layers are reviewed one's lessons by oneself complex structure and passes using conducing composite material as selfreparing sensitive layer
Sensor, specific process step are：
Step 1：The tetrahydrofuran of 40ml is added in reaction bulb 1, sequentially adds 1g polyacrylic acid (PAA), 86mgN,
N '-dicyclohexylcarbodiimides (DCC), 50mg 4- (dimethyl) pyridine (DMAP) are put into magnetic stir bar and are placed in magnetic force and stir
Mix the rotating speed stirring 2h with 400-500r/min on device；The hydroxy-end capped poly dimethyl silicon of 0.25g is added in above-mentioned reaction bulb
Oxygen alkane (PDMS), magnetic agitation 12h at ambient temperature after sealing；Above-mentioned solution is heated into 90 DEG C of stirring evaporation solvent 20min,
Until solution is in thick, concentrated solution is obtained.
Step 2：The tetrahydrofuran of 40ml is added in reaction bulb 2, sequentially adds 1g polyacrylic acid (PAA), 0.2g hydroxyls
Dimethyl silicone polymer (PDMS), 0.1g poly-dopamines (PDA) and the 0.04g iron chloride (FeCl of base sealing end3), it is put into magnetic force and stirs
It mixes the rotating speed that son is placed on magnetic stirring apparatus with 400-500r/min and stirs 12h；Above-mentioned solution is heated into 90 DEG C of stirring evaporations
Solvent 20min obtains thick liquid until solution is in thick.
Step 3：By the thick liquid drop coating in clean substrate of glass, cure after standing 1h in room temperature.
Step 4：Concentrated solution described in drop coating, continues to cure after standing 1h at room temperature in the film layer that step 3 solidification obtains.
Step 5：Film layer after the step 4 is cured is removed from substrate of glass, draws two conducting wires as electrode；
Step 6：The concentrated solution of the another side equivalent of film layer after step 3 solidification obtains three layers certainly being stored at room temperature solidification
The strain transducer of reparation.
The flexible strain transducer that three layers prepared in the present embodiment review one's lessons by oneself complex structure has good tensile property, conduction
Performance can be repaired quickly at ambient temperature after destruction, and keep the good performance of original sensor.
It will be cut off with blade after strain transducer test in embodiment 1-3, the state for being positioned over fitting by two sections, observation
Its repairing effect simultaneously records (such as following table).
| Electric conductivity | Draftability | Prosthetic | |
| Embodiment 1 | 2.1MΩ | ~140% is good | At room temperature in 30s |
| Embodiment 2 | 320KΩ | ~150% is good | At room temperature in 30s |
| Embodiment 3 | 530KΩ | ~180% is good | At room temperature in 30s |
Embodiment 3 is applied to human motion state to carry out monitoring (as Figure 2-3) in real time before and after reparation, experiment knot
Fruit shows to acquire resistance data using Keithley 4200-SCS signal pickers, tests and monitor wrist after different reparation numbers
The resistance variations response diagram of portion's bending.Three after being repaired it can be seen from three in Fig. 4 different test curve figures for repairing number
Layer selfreparing flexibility strain transducer still maintains good performance, such as stability, response and reproducibility.In addition, this
Three layers of selfreparing flexibility strain transducer can be used for the small deformation physiological activity of human body (breathing, pulse) and motion state, and (joint is curved
It is bent) real-time monitoring.
Claims (9)
1. a kind of three layers of selfreparing flexibility strain transducer, it is characterised in that：Including selfreparing sensitive layer (2), the selfreparing
Sensitive layer (2) upper and lower surface is each provided with selfreparing encapsulated layer (1).
2. a kind of three layers of selfreparing flexibility strain transducer according to claim 1, it is characterised in that：The selfreparing envelope
It includes following components to fill layer (1)：The hydroxy-end capped dimethyl silicone polymer (PDMS) of 0.2-0.33 parts by weight, 0.8-1 weight
The polyacrylic acid (PAA) of part, the N of 0.070-0.086 parts by weight, N '-dicyclohexylcarbodiimides (DCC) and 0.050-0.056
4- (dimethyl) pyridine (DMAP) of parts by weight.
3. a kind of three layers of selfreparing flexibility strain transducer according to claim 1, it is characterised in that：The selfreparing is quick
Sense layer (2) includes the one kind adulterated in carbon-based material or conducing composite material.
4. a kind of three layers of selfreparing flexibility strain transducer according to claim 3, it is characterised in that：The doped carbon system
Material includes the polyacrylic acid (PAA) of 0.8-1 parts by weight, the poly-dopamine (PDA) of 0.1-0.2 parts by weight and 0.02-0.05 weights
Measure part carbon-based material；
Or 1 polyacrylic acid (PAA) of parts by weight, 0.2-0.33 parts by weight hydroxy-end capped dimethyl silicone polymer (PDMS),
The carbon-based material of poly-dopamine (PDA) and 0.02-0.05 parts by weight of 0.1-0.2 parts by weight.
5. a kind of three layers of selfreparing flexibility strain transducer according to claim 4, it is characterised in that：The carbon-based material
Including one in graphene, redox graphene, graphene quantum dot, graphene nanometer sheet, carbon nanotube, carbon nano-fiber
Kind is several.
6. a kind of three layers of selfreparing flexibility strain transducer according to claim 3, it is characterised in that：It is described to lead composite wood
Material includes the polyacrylic acid (PAA) of 0.8-1 parts by weight, the poly-dopamine (PDA) of 0.1-0.2 parts by weight and 0.05-0.1 parts by weight
Iron chloride (FeCl3)；
Or hydroxy-end capped dimethyl silicone polymer, the 0.1-0.2 of 1 polyacrylic acid (PAA) of parts by weight, 0.2-0.33 parts by weight
The poly-dopamine (PDA) of parts by weight and the iron chloride (FeCl of 0.05-0.1 parts by weight3)。
7. a kind of preparation method of three layers of selfreparing flexibility strain transducer, it is characterised in that：Include the following steps：
Step 1：Selfreparing encapsulated layer composite material is prepared, concentrated solution is obtained；
Step 2：Selfreparing sensitive layer composite material is prepared, thick liquid is obtained；
Step 3：By the thick liquid drop coating in substrate of glass, solidification is stood at room temperature；
Step 4：Concentrated solution described in drop coating, stands solidification at room temperature in film layer after step 3 solidification；
Step 5：Film layer after the step 4 is cured is removed from substrate of glass, draws two conducting wires as electrode；
Step 6：The concentrated solution of the another side equivalent of film layer, three layers of selfreparing are obtained being stored at room temperature solidification after step 3 solidification
Strain transducer.
8. the design and preparation method of a kind of three layers of selfreparing flexibility strain transducer structure according to claim 7,
It is characterized in that：The step 1 is specially：
S101：The tetrahydrofuran of 40-50ml is added in reaction bulb, sequentially adds 0.8-1g polyacrylic acid (PAA), 70-
86mg N, N '-dicyclohexylcarbodiimide (DCC) 50-56mg 4- (dimethyl) pyridine (DMAP), is put into magnetic stir bar simultaneously
Rotating speed stirring 1-2h with 400-500r/min is placed on magnetic stirring apparatus；
S102：The hydroxy-end capped dimethyl silicone polymers (PDMS) of 0.2-0.33g are added in above-mentioned reaction bulb, in room after sealing
Magnetic agitation 8-12h under the conditions of temperature；
S103：Above-mentioned solution is heated 60-90 DEG C of stirring evaporation solvent 20-30min to obtain dense molten until solution is in thick
Liquid.
9. the design and preparation method of a kind of three layers of selfreparing flexibility strain transducer structure according to claim 7,
It is characterized in that：The step 2 is specially：
S201：Prepare conducing composite material solution：The tetrahydrofuran of 40-50ml is added in reaction bulb, sequentially adds 0.8-
1g polyacrylic acid (PAA), 0.1-0.2g poly-dopamines (PDA) and 0.05-0.1g iron chloride (FeCl3)；Or 1g polyacrylic acid
(PAA), dimethyl silicone polymer hydroxy-end capped 0.2-0.33g, 0.1-0.2g poly-dopamines (PDA) and 0.05-0.1g chlorinations
Iron (FeCl3), it is put into the rotating speed that magnetic stir bar is placed on magnetic stirring apparatus with 400-500r/min and stirs 8-12h；
Or prepare doping carbon-based material solution：The tetrahydrofuran of 40-50ml is added in reaction bulb, sequentially adds 0.8g-1g
Polyacrylic acid (PAA), 0.1-0.2g poly-dopamines (PDA) and 0.02-0.05g carbon-based materials or 1g polyacrylic acid (PAA), 0.2-
Dimethyl silicone polymer (PDMS), 0.1-0.2g poly-dopamines (PDA) and 0.02-0.05g carbon system material hydroxy-end capped 0.33g
Material；
S202：Above-mentioned solution is heated 60-90 DEG C of stirring evaporation solvent 20-30min to obtain thick until solution is in thick
Shape liquid.
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| US16/036,612 US10816418B2 (en) | 2018-05-09 | 2018-07-16 | Three-layer self-healing flexible strain sensor and preparation method thereof |
| US17/006,782 US11215515B2 (en) | 2018-05-09 | 2020-08-28 | Preparation method of three-layer self-healing flexible strain sensor |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20210041313A1 (en) | 2021-02-11 |
| US10816418B2 (en) | 2020-10-27 |
| US11215515B2 (en) | 2022-01-04 |
| US20180340848A1 (en) | 2018-11-29 |
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